Read all about the American Recovery and Reinvestment Act (Stimulus Plan) at the Recovery.gov site. The FAQ page explains how individuals can participate in the process and provide suggestions, comments, and ideas.
Links are provided to the state plans; for Wisconsin see http://www.recovery.wisconsin.gov/
There are scammers offering to help businesses and people file for their stimulus money, so beware of fake sites! The Small Business Administration has issued warnings about scammers contacting small businesses asking for financial information that is supposedly needed for the business to qualify for tax rebates under the stimulus plan (www.sba.gov and click on "Scam Alert").